The invention of weapons, is it possible?

Question

Startups

1) How is the arms business generally regulated?
2) Is it possible to become one of the gunsmiths who create not just farts, but sights that help to make a 100% accurate shot, active protection systems, etc.?
3) Even if you manage to create something like this, then who will offer it later (except for the black market (FSB, this is just a joke))?

Answer 1

Come to the specialized research institute (Scientific Research Institute), offer an idea, maybe they will be imbued with your enthusiasm and will hire you, allocate a laboratory. You make a prototype, conduct tests, write to the Minister of Defense - he will look at the test results, give money for an experienced pariah.